Chimneys



P 2, 1969 1P. J. AKE ROSENBERG 3,464,174

CHIMNEYS Filed Nov. 16, 1967 4 Sheets-Sheet l 15 Iii INVENTOR; PER JAN AK! ROSENBER6 P 1969 P. J, AKE ROSENBERG 3,464,174

GHIMNEYS 4 Sheets-Sheet 2 Filed Nov. 16, 1967 p 969 P. J. AKE ROSENBERG 3,464,174

CHIMNEYS Filed Nov. 16. 1967 4 Sheets-Sheet 5 FIGJ.

\ u M f/ j] FIGS KNVENTORI PER JAN A E Roseweeras by 5 M, 8%}; Mia

Sept. 2, 1969 P. J. AKE ROSENBERG 3,464,174

. CHIMNEYS Filed Nov. 16, 1967 4 Sheets-Sheet 4 N \1 EN TOR.

PER JAN Axe ROS E-N BERG w-M, swiggwa United States Patent 3,464,174 CHIMNEYS Per Jan Ake Rosenberg, Malmo, Sweden, assignor to Rosengrens Plat AB, Malmo, Sweden Filed Nov. 16, 1967, Ser. No. 683,592 Claims priority, application Sweden, Nov. 18, 1966, 15,803/ 66 Int. Cl. E04h 12/28 U.S. Cl. 52-218 7 Claims ABSTRACT OF THE DISCLOSURE A chimney composed of stacked prefabricated elements and a smoke flue extending in the middle of the stacked elements which produce around the smoke flue a first space located closest to the smoke flue for insulation purposes and a second space located outside said first space for ventilation purposes, said first space allowing the use of such insulating material as burnt expanded clay.

This invention relates to a chimney comprising a smoke flue extending from a boiler or other heating source outlet socket through one or more floorings and a roof structure to a suitable height above said roof structure, a first jacket enclosing said smoke flue and spaced so large a distance therefrom that there is formed between said smoke flue and the jacket a space suflicient for accommodating a suitable heat insulating material, and a second jacket surrounding said first jacket and spaced so large a distance therefrom that there is formed between said first and second jackets a space suitable for ventilation purposes.

Particularly in the prefabricated house industry an objective is a far-reaching rationalization which more or less reduces the need of actual experts for erecting the houses and assembling the house building sets. One step in this direction has been made by the suggestion of a number of chimney constructions whose assembly requires less professional work at the building site than was required but a few years ago. One thus continuously aims at a further improvement and simplification of existing chimney constructions, and the present invention has for its object to reduce to a minimum, if not altogether eliminate, the professional work required for assembling a chimney construction at the building site. However, it is realized by those skilled in the art that the present invention is not restricted to prefabricated small house chimneys but can be applied to any chimneys whatever.

The object of the invention outlined in the foregoing is realized in that the first and the second jackets are composed of a number of stacked prefabricated elements in which the first jacket portion is connected to the second jacket portion in such a way that the assembled elements constitute a number of individual ventilation air ducts.

The above and further features of the invention and the advantages gained thereby will become apparent from the following specification in which reference is made to the accompanying drawings which illustrate an embodiment, chosen by Way of example, of the chimney.

In the drawings:

FIGURE 1 is a diagrammatic view of a chimney mounted in a house;

ice

FIGURE 2 is a side elevation of an element of the chimney in FIGURE 1;

FIGURE 3 is a sectional view of an insulated flue within an outer jacket supported in spaced relation to an outer jacket, according to this invention;

FIGURE 4 is a partial longitudinal section on line IV-IV in FIGURE 3;

FIGURE 5 is a partial plan view of a bottom portion;

FIGURE 6 is a perspective view of a cover section;

FIGURE 7 on a larger scale is a detail section of a joint between two elements.

FIGURE 1 diagrammatically shows part of a house comprising a flooring 1 and a roof structure 2. A boiler 3 having a boiler outlet socket 4 is diagrammatically shown in said house. A chimney structure extends from the socket 4 through the flooring 1 and the roof structure 2 to a suitable height above said roof structure.

The chimney structure comprises a smoke flue 5 which is supported on the boiler outlet socket 4. Surrounding the smoke flue S is a first or inner jacket 6 and a second or outer jacket 7. The inner jacket 6 and the outer jacket 7 are divided into a suitable number of elements 8 which are placed on top of each other and are closed by means of a cover 9. The elements '8 are supported by a supporting structure 10 which is placed on the flooring 1 and consists of T-irons 11 and a bottom portion 12. Said bottom portion 12 closes the space between the inner jacket 6 and the outer jacket 7. The inner jacket 6 is extended from the supporting structure 10 to the boiler outlet socket 4 with the aid of a section 13 which is insertable from below into the inner jacket 6 and which at the lower end is bent inwardly towards the smoke flue 5 or has a bottom portion.

The element 8 extending through the roof structure has a sheet lead envelope 14 for sealing the joint between the roof structure 2 and the chimney structure. Moreover, a sheet lead envelope 15 is provided between the smoke flue and the cover 9 for sealing the joint between them and for taking up heat expansion movements between them.

The joint between the boiler outlet socket 4 and the smoke flue 5 is sealed in any conventional manner, for instance by means of a toe portion as in FIG. 1. The smoke flue is heat insulated from its environment by heat insulating material 16 which fills out the space between the smoke flue 5 and the inner jacket 6. The heat insulating material 16 preferably consists of particles of burnt expanded clay.

The construction of the elements 8 of the chimney structure will now be described more in detail in connection with FIGURES 2-4. Each element has an outer jacket 7 and an inner jacket 6. Angle irons 17 are provided in each element both at the upper and the lower ends thereof.

In the embodiment illustrated the outer jacket 7 is of square cross section, and the inner jacket 6 also is of square cross section but is turned through an eighth of a revolution relative to the outer jacket and is secured to it at the corners substantially along the longitudinal side median line of the outer jacket. The corners of the inner jacket 6 are extended towards the outer jacket 7 being preferably formed of separate sheets for the sides meeting at the corners thence extending to jacket 7, and are each provided with a flange 18 by which the inner jacket is secured, preferably welded, to the outer jacket. This corner design is shown more in detail in FIGURE 3.

Each element thus has a smoke flue and four ventilation air ducts which shall all be separated from each other. To this end there is provided, as shown in FIGURE 4, a guide means at each corner of the inner jacket 6. This guide means 25 also serves to guide the different superimposed elements 8. As will be clearly seen from FIGURE 4, the guide means comprises male portion 26 and female portion 27. Guide means of this type are arranged at each corner of the inner jacket in each element and in the bottom portion 12.

The bottom portion comprises four identical parts 19 (FIGURE 5) closing the ventilation air ducts. In FIG- URE 5 the dotted line indicates a hole to be provided for the connection of a ventilation air pipe. Similar holes can be provided also in the outer walls of the elements. The bottom portion thus comprises four identical parts 19 which are supported by the T-irons 11.

FIGURE 6 shows a perspective view of a cover 9. This cover has an outer casing which extends from the smoke flue 5 outwardly over the outer jacket. The cover 9 includes a part 6a covering the inner jacket 6 and having its corners extended outwardly over an outer jacket member 7a which projects into the corner walls 21 through slots therein. The corner walls 21 serve to define the ventilation air ducts formed between the inner jacket 6 and the outer jacket 7. As shown by shadow lines a sheet lead envelope 15 is provided between the smoke flue 5 and the casing 20. Said envelope 15 is for sealing the joint and for taking up heat expansion movements between the smoke flue 5 and the cover 9.

In addition to the guide means, snap means are provided between elements 8, between the uppermost element and the cover 9 and between the lowermost element and the bottom portion 12, as will be seen from FIGURE 7. Downwardly directed eyelid openings are provided in the angle irons 17 and the jacket wall is bent outwardly at 24 to form between the angle irons 17 and the jacket wall 24 a suflicient space for the jacket wall of another element in which there is an eyelid opening corresponding to the eyelid opening 23. When the eyelid openings have snapped into engagement the angle irons 17 of an element will rest upon the angle irons 17 of another element. As a result, there is obtained an essentially fixed connection between the various parts of the chimney structure.

For mounting the chimney structure the member 13 is first placed in position whereupon the supporting structure 10 is placed upon the first flooring 1. Then a first element 8 is fitted to the bottom portion and on top of said element a further number of requisite elements up to the roof structure 2. The element extending through the roof structure 2 shall have a sheet lead envelope 14. A further number of requisite elements -8 are then placed on top of the element having the sheet lead envelope. Being allwelded from stainless acid-resistant sheet metal, the smoke flue 5 can now be inserted in the smoke gas duct formed by the inner jacket 6 until it rests on the boiler outlet socket 4. Now the member 13 is pushed up into the smoke gas duct and the joint between the socket 4 and the smoke flue 5 is sealed. Member 13 is again retracted from the smoke gas duct and placed against the boiler outlet socket 4. Between the smoke flue 5 and the uppermost element 8 there is now provided centering means which may be removed later. The part of the smoke gas duct remaining after the insertion of the smoke flue 5 thereinto is filled out with heat insulating material which as already mentioned preferably consists of particles of burnt expanded clay. After that the cover 9 is placed in position, and the chimney structure is now finished after the sheet lead envelopes have been fitted. Ventilation air pipes can now as desired be connected to the ventilation air ducts, said pipes being indicated by dash-and-dot lines in FIGURE 1.

It will readily be seen that assembling the chimney in the manner described above does not require any direct 4 technical skill but can be effected by any reasonably handy person.

While an embodiment of the invention has been described in the foregoing and shown in the accompanying drawings it is obvious that many modifications may be resorted to within the scope of the invention defined in the appended claims. Thus the cross section of for instance the inner jacket may be hexagonal while that of the outer jacket is square. Also with such a modification of the cross section of the inner jacket the diagonals thereof will be approximately equally long as the sides of the cross section of the outer jacket. Furthermore, the supporting structure including the bottom portion 12 may be integral with the lowermost element 8 of the chimney structure.

What I claim and desire to secure by Letters Patent is:

1. A vertical chimney structure comprising a plurality of end-to-end, aligned, connected, prefabricated sections, each section including an outer rectangular and inner rectangular jacket each corner of the inner jacket being spaced inwardly from a corresponding side wall of the outer jacket, said inner jacket including outwardly projecting flanges at each corner thereof, said flanges extending from the inner jacket corners to the respective side walls intermediate a pair of adjacent corners of the outer jacket for maintaining the jackets in spaced relation, a tubular flue pipe disposed within the inner jacket and extending throughout the aligned sections, said pipe being spaced inwardly of the inner jacket walls, particulate insulation materials filling the space between said pipe and said inner jacket, and closure means at the end of the lowermost section closing the space between said pipe and said inner jacket.

2. A chimney structure according to claim 1, wherein said outer jacket terminates intermediate the upper and lower ends of said structure, a base disposed at the lower end of the outer jacket adapted for support of said structure at a floor through which the structure passes, the spaces between said outer and inner jackets being unobstructed.

3. A structure according to claim 2, wherein said closure means closing the space between the pipe and inner jacket extends downwardly from said base supporting the lower end of the outer jacket to substantially the lower end of said pipe the space therein exterior to the pipe being filled with material for insulating the pipe below said base.

4. A structure according to claim 1, said inner jacket being fabricated of four like sections each comprising a vertical flange extending inwardly from the middle portion of one side of the outer jacket thence diagonally across an adjacent comer of the outer jacket to form a side of the inner jacket, thence outwardly to a middle portion of an adjacent side, the four sections being juxtaposed with the respective diagonals thereof forming a square inner jacket rotated about 45 with respect to said outer jacket.

5. A structure according to claim 1, including lifting flange means on one end of each section for a positioning juxtaposed section ends, and detent portions in the flange and nested section ends comprising means for locking the two sections together when fully nested.

6. The vertical chimney structure comprising a plurality of end-to-end aligned, connected, prefabricated sections of which each section includes an outer polygonal jacket and an inner polygonal jacket comprising faces formed from a sheet outwardly turned at corners of the inner jacket to form lateral flanges extending to engagement with the outer jacket, contiguous flanges of adjacent inner jacket faces being positioned in parallel relationship as a common wall separating ventilation ducts exterior to respective inner jacket faces within said outer jacket, a continuous smoke flue disposed within the aligned inner jackets supported at a lower end thereof and spaced therefrom to provide insulation space between the inner jacket and smoke flue, a closure member at the bottom of the inner jacket to form a retainer for particulate insulation about the flue, a body of particulate insulation filling the space above the retainer, and means supporting said inner and outer jackets independently of support for said flue.

7. A chimney according to claim 6, said insulation material being burnt expanded clay.

References Cited UNITED STATES PATENTS Re. 23,199 2/1950 Baker 52--148 41,993 5/1864 Harvey 98-46 117,555 8/1871 McCord 98-46 179,678 7/1876 Bourne 98-46 583,819 6/1897 Rome 138148 593,303 11/1897 Lemke 98-46 1,429,822 9/1922 Acer 138148 2,277,286 3/1942 Bechtner 52169 FOREIGN PATENTS 2/1964 Canada.

236,609 10/1964 Austria.

OTHER REFERENCES 10 Lead Flashings, Weatherings, and Roofings, Lead Development Association, 1958, pp. 16, 20, 22, and 27.

HENRY C. SUTHERLAND, Primary Examiner US. Cl. X.R. 

